As it turns out, the Android 4.4.4 update for the AT&T HTC One M8 that we covered over a week ago never actually rolled out to devices. The company pulled its page down, which suggests that it went up sooner than anticipated. HTC Vice President of Product Management Mo Versi took to Twitter over the weekend to announce that the OTA was actually due out this week, and that it would include both VoLTE support and the HTC Eye Experience software enhancements.

@jmchatton@htc We just received TA on 4.4.4 for AT&T M8. Will include VoLTE and the HTC Eye SW experience. OTA to start early next week

This week has come, and the changelog has again appeared on AT&T's website. The items are the same as before, but here they are again if you're viewing them for the first time.

What's new:

Enables HD Voice

Updates Android OS to Android 4.4.4

Security enhancement

Bluetooth enhancement

Adds AMBS Cloud Messaging Integration

Adds Copy and Paste camera feature

Adds Usage Manager App

Improves battery performance

Updates AT&T Ready2Go

Updates Visual Voicemail

Note, this update is only for the AT&T HTC One M8 (0P6B120). It will bump the device up to version number 3.42.502.1 once everything is installed and running. Hopefully this time everything is good to go.